Pump system using a control fluid to drive a switching valve mechanism for an actuating fluid
US6874997B2 · kind B2 · utility
23Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2002 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B9/135
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
There is provided a pump system excellent in a maintenance ability and compatibility. The pump system comprises a pump (1) for transferring a liquid by alternately supplying air to air chambers (17a, 17b) to extend and contract a pair of bellows (13a, 13b) linked to a shaft (15). It also comprises a switching valve mechanism (2) for switching the air supplied to the pump (1). Switching mechanisms (40a, 40b) are employed to switch the pilot air for controlling the switching operation of the switching valve mechanism (2). The switching mechanisms are detachably attached to cases (16a, 16b) of the pump (1) from outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.